Pigments are responsible for the colour and the effect of the paint coating. The colour is determined by pigments made of mineral or organic substances. Plastic pigments, which are coated with titanium oxide or iron oxide, cause the pearl effect.
The various shades of colour arise as a result of light refraction and reflection on the coating of the pigments. Depending on the thickness of the oxide layer and the incidence of light, a different play of colours is produced with different pearl effects: reddish, white, purple or golden.
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